North Korea announced Tuesday it planned to restart a nuclear reactor it shut down five years ago, the latest announcement in weeks of ramped-up rhetoric that has South Korea and its allies watching the country closely. Take a look at the history of the two Koreas.
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U.S. Army
Various dynasties ruled Korea for thousands of years until 1910, when Japan forced Korea to become its colony. Korea was ruled by Japan until 1945, when Japan surrendered to the allies at the end of World War II.